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Meteorology Science Fair Project

Cloud in a Bottle

Cloud in a Bottle | Science Fair Projects | STEM Projects
Is it really possible to make a cloud in a bottle? Yes it is! All you need is a jar, some water, and a match. Then, watch as the pressure and temperature in the jar cause the water vapor to condense and form a cloud.


The hypothesis is that the pressure and temperature in the jar will cause the water vapor to condense and form a cloud.

Method & Materials

You will place water and a lit match in a jar, then quickly cover the jar with a plastic bag and secure it with a rubber band.
You will need a wide-mouth gallon pickle jar, a heavy-duty clear plastic bag, and rubber bands or masking tape.


This experiment shows how humidity, temperature, and air pressure can influence the formation of clouds. When the bag is pushed into the jar, the pressure and temperature increase, causing the jar to clear. When the bag is pulled out, the pressure and temperature decrease, allowing the water vapor to condense and form a cloud.

Why do this project?

This science project is unique because it allows students to observe the direct effects of pressure and temperature on cloud formation.

Also Consider

Experiment variations include using a dishwashing glove (first video) or placing ice at the top of the bottle (second video), instead of the plastic bag.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
Get ready to create a cloud in a bottle that appears and disappears right before your eyes! You only need a few items to make it happen: a dishwashing glove, water, a lit match, and a glass jar. But here's the catch - if you don't use all these things, the cloud won't form. Watch as she demonstrates this by removing each item, one by one, and see what happens. It's a fun and easy experiment that you can do at home to learn about the science of clouds!
Discover the captivating science behind cloud formation! This video offers a simple and comprehensive explanation of how clouds are formed and how you can make a cloud in a bottle at home. All you need is ice cubes, hot water, food coloring, a lit match, and a glass bottle. By the end of the video, you'll have a better understanding of the amazing science that creates the clouds above us!
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